Philosophy of Being and Knowledge

Semiotics (Theory of Signs)

Definition

Everything that a person perceives in any form is a sign that conveys knowledge about something else. For instance, when one sees smoke, they understand that there is a fire. Thus, smoke is a sign of fire. Similarly, when one hears the sound of a car, they infer that a car has passed by. Hence, the noise is a sign of the car. Words and sentences are signs that carry information about something. No one utters words merely for the sake of the words themselves but to signify something. Typically, people do not look at a thermometer because they are interested in the thermometer itself, but because the thermometer's readings are signs of temperature. Facial expressions and gestures are signs that convey information. Clothing reflects a person's status or life stance. Architecture, painting, and sculpture—all these are signs of something. Humans have no other means of perceiving reality except through signs. Everything is a sign for a person: objects, actions, phenomena, words, and so forth. Given the critical role of signs, they have become the subject of a distinct philosophical discipline known as semiotics or the theory of signs. This field's name derives from the Greek word "σημεῖον" (sign).

Semiotics as a distinct philosophical discipline emerged at the turn of the 19th and 20th centuries, thanks to the efforts of American philosopher Charles Sanders Peirce. However, this does not imply that the problem of signs was not important to philosophers before Peirce. Numerous researchers had paid much attention to this issue, but they did not isolate their studies into a separate science; rather, they conducted their inquiries within the framework of other fields of knowledge, such as grammar, logic, epistemology, and so on. Therefore, the study of semiotics should begin long before Peirce, though it is fitting to credit Peirce with founding this science.

The first challenge faced by semiotics is proving its right to exist. Each field utilizes its own system of signs. For example, mathematics uses numbers, specific symbols, and figures, while language employs words. Thus, each domain has its own semiotics. These specialized semiotics are the subject of distinct sciences. Consequently, the number of sign systems corresponds to the number of specialized semiotics: mathematical semiotics in mathematics, linguistic semiotics in language, artistic semiotics in art, and so on. The existence of specialized semiotics is evident. However, semiotics as a branch of philosophy is based on the fundamental belief that all sign systems are grounded in the same principles. Therefore, at the level of philosophical knowledge, it is appropriate to discuss not specialized semiotics but general semiotics, or a universal theory of signs, whose principles are realized across all sign systems. According to this belief, the semiotics of any field is an implementation of general semiotics.